The public service broadcaster was found to have committed a "significant breach" of media regulations by not revealing that the narrator of a film about Gaza was the son of a Hamas official, according to UK media regulator Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The head of the BBC had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
The authority has instructed the corporation to air a peak-time declaration about its conclusions.
"Since this amounts to a significant violation of our code, we are directing the broadcaster to broadcast a message of our findings against it on the BBC's second channel at 9pm, with a schedule to be confirmed," the statement read.
'Potential to Undermine Credibility'
The watchdog's report declared: "Our investigation found that the programme's failure to disclose that the voice's parent served in a position in the Hamas-administered administration was materially misleading.
"Consequently that the audience did not have critical information which may have been highly relevant to their evaluation of the presenter and the details he shared.
"Confidence is at the core of the connection between a broadcaster and its audience, especially for a state-funded media outlet such as the BBC.
"This failing had the risk to undermine the exceptionally strong amounts of trust that viewers would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was removed from iPlayer in February after the boy's family links emerged, and in the month of July an internal BBC review found it violated the organization's content policies on factual correctness.
A representative for the broadcaster stated: "The regulator's decision is in agreement with the conclusions of Peter Johnston's review, that there was a significant failing in the film in relation to the corporation's content standards on accuracy, which corresponds to regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with Ofcom's decision in full. We will follow the penalty as soon as the schedule and wording are confirmed."
